Let’s be abundantly clear: as of this writing, there’s still no official word on what caused the Verizon outage. The FCC has launched an investigation, but Verizon has remained mostly silent, offering only a brief apology acknowledging the disruption and stating that the issue is being resolved.

Verizon has confirmed that its cell service is beginning to come back online following a massive outage affecting some of its mobile phone customers.

Some Verizon customers have been hit by a service outage. The issue Monday appeared to knock out cellphone service for tens of thousands of people.